What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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101domain.com

https://101domain.com· First analyzed 24 Apr 2026· Updated 24 Apr 2026

Export

101domain.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.20.14.253

Site Location

🇺🇸 United Statesvia phone

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

cody.ns.cloudflare.com.nina.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

308 ms10%

Speed Index

400 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

39 KB

57 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

CDN

SEO Analysis

B71/100

Meta Tags9/15

Content11/12

Headings8/8

Technical23/25

E-E-A-T2/7

Images4/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

101domain.com101domain.com

101domain - Domain Names - Website Services - Brand and Corporate S...

101domain is The Leader in International Domains - If it’s available, we can register it. We can also help you build it, host it, and secure it.

Title truncated.

Title Length106 chars

Recommended: 50-60 chars (~654px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (106 chars, ~654px). Will be truncated in search results.

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

6,139 URLs

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

27/100

Needs Work

7 11

Sponsored

AI & LLM Readiness

D44/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

2/25

Citation

9/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:9%

Words:1,662

Token eff.:Optimal

Sections/1K:9.6

Depth:1/5

Structured Data

1 JSON-LD

Organization×1.1

Citation Readiness

Opening Summary373w

Descriptive Headingsavg 5.1w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

59/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

8/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

73/100

A+

4 mg

CO₂e / view

39.0 KB

Page Weight

95%

Cleaner Than

New Visitor

5 mg

Returning (cached)

2 mg

Annual (10K/mo)

468 g

Emission Segments

Data Center

<0.001 g

Network

1 mg

Device

3 mg

Resource Breakdown

JavaScript

8.0 KB

HTML

29.6 KB

Other

1.4 KB

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

50%Poor

Critical / Transactional

HTTPS

WAF

264d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.12.2025

Valid Until

13.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.101domain.com101domain.com

SHA-256 Fingerprint

DF:43:C4:4F:95:78:23:84:09:46:1F:64:26:CA:16:CB:6E:02:BD:E5...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

⚪ Custom()

cf-cache-status

EXPIRED

cf-ray🇩🇪 Frankfurt

9f1151737dac80ad-FRA

content-encoding

⚡ Brotli(br)

content-security-policy

default-src 'self' 'unsafe-inline' 'unsafe-eval' https://ima...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

alt4.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

101domain.com

Domain Age

26y 12m

Created

04.05.1999

Expires

04.05.2031

Last Updated

26.07.2021

Registrar

101domain GRS Limited

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

75/100

Mobile Friendly17 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0, maximum-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Lato

WCAG Partial

76/100

Readability

/30

24/30

19px · LH 1.30

Hierarchy

/20

15/20

2.21x ratio · ✓ H1→H6

WCAG

/25

17/25

2.75:1 min contrast

Performance

/25

20/25

1 font · 2 req

Heading Font

Lato

Sans42px

Body Font

Lato

Sans19px

Contrast Ratio

2.75:1

12 issues

Reading Comfort

~42 CPL

Narrow lines

42px

64px

24px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 2.8:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

Buy on MyFontsFlesch 48

Color Palette

6 unique colors

Light

#ffffff

Primary· 50.1%

#e9eef2

Background· 31.1%

#284858

Secondary· 6.2%

#76978a

Secondary· 5.1%

#aacec7

Secondary· 4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

101domain.com(13)local(2)my.101domain.com(1)rum-static.pingdom.net(1)analytics.ahrefs.com(1)

Website Identity

101domain

Organization

+1-760-444-8674

www.101domain.com/

26 years old

Location detected: 🇺🇸 United Statesvia phone

101domain GRS Limited📧 Google Workspaceen

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 24 Apr 2026 at 01:26

Historical Analysis & Change Tracking